Roll Fuchsia Linux SDK from RVHAIKU50ogkiV-Lj... to l6mWjvlO1xJg5ZFKK... (flutter/engine#50579)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-linux-sdk-flutter-engine
Please CC chinmaygarde@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

DEPS

@@ -996,7 +996,7 @@ deps = {
      'packages': [
        {
         'package': 'fuchsia/sdk/core/linux-amd64',
-        'version': 'RVHAIKU50ogkiV-LjqGMenlaBlAy2QNDBpQQIRIIdjoC'
+        'version': 'l6mWjvlO1xJg5ZFKKwU7YJDjzw-ncLCsu2BjKF1plHcC'
        }
      ],
      'condition': 'host_os == "linux" and not download_fuchsia_sdk',

engine/src/flutter/ci/licenses_golden/licenses_fuchsia

@@ -1,4 +1,4 @@
-Signature: 9be2b8c4505298670a6ee86261cbed78
+Signature: a20e85377cdb949701c7a7cb8df8005c
 
 ====================================================================================================
 LIBRARY: fuchsia_sdk